[petsc-dev] DMComplex and PCFieldSplit

[Jed Brown]

We need a richer field interface. Some way for a client of DM to discover
vector and tensor structure. Possibly also (eventually) a way to solve
equations of state so that we can formulate reduced problems in
non-conservative variables.
On Feb 24, 2012 2:19 PM, "Matthew Knepley" <knepley at gmail.com> wrote:

> On Fri, Feb 24, 2012 at 1:58 PM, Jed Brown <jedbrown at mcs.anl.gov> wrote:
>
>> http://petsc.cs.iit.edu/petsc/petsc-dev/rev/518ff70e8a0a
>>
>> Matt, I want to get rid of these conditionals, not add more. We should
>> have a DM base interface for getting fields on which to split, that common
>> interface should _replace_ the DMComposite specialization.
>>
>
> I agree. However, I won't put anything in until I do it by hand once.
>
> Also, I was tempted to just promote DMGetGlobalISes(), but its not quite
> right. I am planning
> to put the IS method in PetscSection. I am hoping eventually DMDA uses
> PetscSection for
> layout.
>
>    Matt
>
> --
> What most experimenters take for granted before they begin their
> experiments is infinitely more interesting than any results to which their
> experiments lead.
> -- Norbert Wiener
>
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